//
// Copyright (c) 2010 Luís Reis
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using Pine.Lexer;

namespace Pine.SourceParser.Tree
{
	public enum OperationType {
		Sum,
		Minus,
		Multiplication,
		Less,
		LessOrEqual,
		Greater,
		GreaterOrEqual,
		Equal,
		NotEqual,
		LogicalAnd,
		LogicalOr
	}
	
	public static class OperationTypeOperations {
		public static string TypeString(this OperationType type) {
			switch (type) {
			case OperationType.Sum: return "+";
			case OperationType.Minus: return "-";
			case OperationType.Multiplication: return "*";
			case OperationType.Greater: return ">";
			case OperationType.GreaterOrEqual: return ">=";
			case OperationType.Less: return "<";
			case OperationType.LessOrEqual: return "<=";
			case OperationType.Equal: return "==";
			case OperationType.NotEqual: default: return "!=";
			}
		}
	}
	
	public class BinaryOperation : Expression
	{
		public Expression left, right;
		public OperationType type;
		
		public BinaryOperation ()
		{
		}
		
		public BinaryOperation (OperationType type, Expression left, Expression right)
		{
			this.type = type;
			this.left = left;
			this.right = right;
		}
		
		public override string ToString ()
		{
			return "(" + left.ToString() + ") " + type.TypeString() + " (" + right.ToString() + ")";
		}
	}
}

